It seems like I read recently that for various reasons, the slave-based economy in pre-civil war United States were demonstrably innefficient system, as compared to wage-labor.seankreynolds said:In the FRCS I estimated 75-150 gp for a typical slave, based on the cost of paying a day laborer for one year (365 sp= 36.5 gp), an estimated lifespan of two years for a hard-worked slave, and the ongoing cost of feeding and housing your slaves. Any less than that and you'd never use anything other that slave labor, any more and it's not cost-effective to own slaves.